Minimize the VB form

[FuzzyLogic]

I am calling a public function of VB dll from excel macro.

This shows me a Non - Modal form, which always on Top.

Now, when excel is minimized this form remain on top.

I want to minimize this form when excel is minimized
and reset it to normal when excel is restored.

I am having the reference of the Excel in this dll, from which I am
able to catch the events of the excel in the dll.

But I could not found any event which can show me the window state of
the excel is changed.

Any Suggestions...